Starting Postfix Sender Rewriting Scheme daemon at installation

[eapo]

Hey amazing people!
I was amazed by the info found on yunohost.org, but stuck at installation:

Description of my issue

From the yunohost-installation.log

postsrsd: Generating initial /etc/postsrsd.secret
Starting Postfix Sender Rewriting Scheme daemon: postsrsdpostsrsd: Cannot write PID: /var/run/postsrsd.pid

failed!
invoke-rc.d: initscript postsrsd, action “start” failed.
dpkg: error processing package postsrsd (–configure):
installed postsrsd package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
postsrsd
E: Sub-process /usr/bin/dpkg returned an error code (1)
[e[1me[31mFAILe[0m] Installation of Yunohost packages failed

My YunoHost server

Hardware: VPS bought online (Linux 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5+deb10u1 (2019-07-19) x86_64 GNU/Linux)
YunoHost version: latest from https://install.yunohost.org
I have access to my server : Through SSH
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no